chore: release v0.1.1.19

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Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -36,6 +36,10 @@ ORIGIN=http://localhost:5173
 # Generate: openssl rand -base64 48
 SESSION_SECRET=
 
+# Admin dashboard access — comma-separated list of User IDs (UUIDs)
+# Example: ADMIN_USER_IDS=11111111-2222-3333-4444-555555555555,22222222-3333-4444-5555-666666666666
+ADMIN_USER_IDS=
+
 # Web Push (VAPID) — generate with: npx web-push generate-vapid-keys
 # Public key may also be set on the client as VITE_VAPID_PUBLIC_KEY
 VAPID_PUBLIC_KEY=

VERSION

@@ -1 +1 @@
-0.1.1.15
+0.1.1.20

client/src/App.css

@@ -4919,6 +4919,177 @@ html.theme-cupertino .events-scroll-container {
   padding-bottom: 8px;
 }
 
+.admin-page {
+  width: 100%;
+  max-width: 1200px;
+  min-height: 100vh;
+  margin: 0 auto;
+  padding: 24px;
+  box-sizing: border-box;
+  color: var(--app-text);
+  display: flex;
+  flex-direction: column;
+  gap: 24px;
+}
+
+.admin-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 16px;
+  padding-bottom: 16px;
+  border-bottom: 1px solid var(--app-header-border);
+}
+
+.admin-header-left {
+  display: flex;
+  align-items: flex-start;
+  gap: 20px;
+  min-width: 0;
+}
+
+.admin-title {
+  margin: 0;
+  font-size: 24px;
+  font-weight: 700;
+  background: var(--app-accent-gradient);
+  -webkit-background-clip: text;
+  background-clip: text;
+  -webkit-text-fill-color: transparent;
+}
+
+.admin-subtitle {
+  margin: 6px 0 0;
+  font-size: 14px;
+  color: var(--app-text-muted);
+}
+
+.admin-main {
+  display: flex;
+  flex-direction: column;
+  gap: 24px;
+  width: 100%;
+}
+
+.admin-kpi-grid {
+  margin-top: 0;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+}
+
+.admin-controls {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 24px;
+  padding: 16px 20px;
+  border-radius: var(--app-radius-card);
+  border: 1px solid var(--app-border-subtle);
+  background: var(--app-surface);
+}
+
+.admin-control-group {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  min-width: 0;
+}
+
+.admin-control-label {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--app-text-muted);
+}
+
+.admin-control-buttons {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px;
+}
+
+.admin-control-buttons .btn {
+  width: auto;
+  padding: 8px 16px;
+  font-size: 14px;
+}
+
+.admin-charts-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
+  gap: 20px;
+}
+
+.dashboard-subtitle {
+  margin-top: 4px;
+  font-size: 14px;
+  color: var(--app-text-muted);
+}
+
+@media (max-width: 640px) {
+  .admin-page {
+    padding: 12px 12px 20px;
+    gap: 16px;
+    min-height: auto;
+  }
+
+  .admin-header {
+    padding-bottom: 12px;
+  }
+
+  .admin-header-left {
+    display: grid;
+    grid-template-columns: auto 1fr;
+    grid-template-rows: auto auto;
+    align-items: center;
+    column-gap: 10px;
+    row-gap: 2px;
+  }
+
+  .admin-header-left .btn-back {
+    grid-row: 1 / -1;
+    align-self: center;
+    padding: 6px 10px;
+    font-size: 13px;
+  }
+
+  .admin-title {
+    font-size: 18px;
+    line-height: 1.2;
+  }
+
+  .admin-subtitle {
+    font-size: 11px;
+    margin: 0;
+    line-height: 1.35;
+  }
+
+  .admin-main {
+    gap: 16px;
+  }
+
+  .admin-controls {
+    display: grid;
+    grid-template-columns: 1fr 1fr;
+    gap: 12px;
+    padding: 12px;
+  }
+
+  .admin-control-buttons {
+    gap: 6px;
+  }
+
+  .admin-control-label {
+    font-size: 11px;
+  }
+
+  .admin-control-buttons .btn {
+    padding: 6px 8px;
+    font-size: 12px;
+  }
+
+  .admin-charts-grid {
+    gap: 14px;
+  }
+}
+
 .stats-consumption-chart .stats-bar-column--grouped {
   display: inline-flex;
   white-space: normal;
@@ -5018,6 +5189,36 @@ html.theme-cupertino .events-scroll-container {
     grid-template-columns: 1fr;
   }
 
+  /* Admin dashboard: keep 2-column KPI grid on mobile (overrides rule above) */
+  .stats-kpi-grid.admin-kpi-grid {
+    grid-template-columns: repeat(2, minmax(0, 1fr));
+    gap: 10px;
+  }
+
+  .admin-kpi-grid .stats-kpi-card {
+    padding: 10px 12px;
+    gap: 8px;
+  }
+
+  .admin-kpi-grid .stats-kpi-icon {
+    margin-top: 0;
+  }
+
+  .admin-kpi-grid .stats-kpi-icon svg {
+    width: 18px;
+    height: 18px;
+  }
+
+  .admin-kpi-grid .stats-kpi-label {
+    font-size: 11px;
+    line-height: 1.25;
+    margin-bottom: 2px;
+  }
+
+  .admin-kpi-grid .stats-kpi-value {
+    font-size: 18px;
+  }
+
   .stats-kpi-value {
     font-size: 20px;
   }
@@ -5663,6 +5864,27 @@ html.theme-cupertino .events-scroll-container {
   border-color: rgba(56, 189, 248, 0.32);
 }
 
+.knorrlabs-footer-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 2px 8px;
+  border-radius: 999px;
+  font-size: 13px;
+  font-weight: 500;
+  color: #94a3b8;
+  text-decoration: none;
+  background: rgba(139, 92, 246, 0.08);
+  border: 1px solid rgba(139, 92, 246, 0.18);
+  transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
+}
+
+.knorrlabs-footer-badge:hover {
+  color: #ddd6fe;
+  background: rgba(139, 92, 246, 0.14);
+  border-color: rgba(139, 92, 246, 0.32);
+}
+
 .demo-badge {
   display: inline-flex;
   align-items: center;

client/src/App.tsx

@@ -36,6 +36,7 @@ import { syncAppearancePrefs } from './services/appearancePrefs.js'
 import { startBackgroundSync, stopBackgroundSync, syncAllLogbooks, subscribeToSyncState } from './services/sync.js'
 import ReadOnlyViewer from './components/ReadOnlyViewer.tsx'
 import DemoViewer from './components/DemoViewer.tsx'
+import AdminDashboard from './admin/AdminDashboard.tsx'
 import PwaInstallPrompt from './components/PwaInstallPrompt.tsx'
 import PwaUpdatePrompt from './components/PwaUpdatePrompt.tsx'
 import AppFooter from './components/AppFooter.tsx'
@@ -49,6 +50,8 @@ import { Ship, LogOut, ChevronLeft, Users, FileText, Settings, Wifi, WifiOff, La
 import DisclaimerHeaderButton from './components/DisclaimerHeaderButton.tsx'
 import FeedbackHeaderButton from './components/FeedbackHeaderButton.tsx'
 import ProfileHeaderButton from './components/ProfileHeaderButton.tsx'
+import AdminHeaderButton from './components/AdminHeaderButton.tsx'
+import { checkAdminAccess } from './services/adminApi.js'
 import { useTranslation } from 'react-i18next'
 import { cycleAppLanguage } from './utils/i18nLanguages.js'
 import {
@@ -92,6 +95,10 @@ function App() {
 
   // Public demo mode (no account required)
   const [isDemoMode, setIsDemoMode] = useState(() => window.location.pathname === '/demo')
+  const [isAdminRoute, setIsAdminRoute] = useState(() => window.location.pathname.startsWith('/admin'))
+  const [isAdminUser, setIsAdminUser] = useState(false)
+  const [sessionChecked, setSessionChecked] = useState(false)
+  const [serverSessionActive, setServerSessionActive] = useState(false)
 
   const syncQueueCount = useLiveQuery(
     () => activeLogbookId ? db.syncQueue.where({ logbookId: activeLogbookId }).count() : db.syncQueue.count(),
@@ -160,14 +167,23 @@ function App() {
     })
   }, [])
 
+  const refreshAdminAccess = useCallback(async () => {
+    const isAdmin = await checkAdminAccess()
+    setIsAdminUser(isAdmin)
+  }, [])
+
   useEffect(() => {
-    if (!isAuthenticated) return
+    if (!isAuthenticated) {
+      setIsAdminUser(false)
+      return
+    }
     const userId = localStorage.getItem('active_userid')
     if (!userId) return
     void syncAppearancePrefs(userId)
     void migrateLegacyCrewToPoolIfNeeded().then(() => syncPersonPool())
     void migrateLegacyYachtsToPoolIfNeeded().then(() => syncVesselPool())
-  }, [isAuthenticated])
+    void refreshAdminAccess()
+  }, [isAuthenticated, refreshAdminAccess])
 
   useEffect(() => {
     const handleOnline = () => {
@@ -199,6 +215,13 @@ function App() {
     const hashParams = new URLSearchParams(window.location.hash.substring(1))
     const path = window.location.pathname
 
+    if (path.startsWith('/admin')) {
+      setIsAdminRoute(true)
+      return
+    }
+
+    setIsAdminRoute(false)
+
     if (path === '/demo') {
       setIsDemoMode(true)
       setIsViewerMode(false)
@@ -240,6 +263,7 @@ function App() {
 
   const clearAuthenticatedAppState = useCallback(() => {
     setIsAuthenticated(false)
+    setIsAdminUser(false)
     setActiveLogbookId(null)
     setActiveLogbookTitle(null)
     setShowUserProfile(false)
@@ -249,7 +273,7 @@ function App() {
 
   /** After PWA/bfcache resume, React state may still say "logged in" while the master key is gone. */
   const enforceUnlockedSession = useCallback(() => {
-    if (isViewerMode || isDemoMode || isAcceptingInvite) return
+    if (isViewerMode || isDemoMode || isAcceptingInvite || isAdminRoute) return
     // Require full local session (incl. userId) so API calls are not left headless.
     if (isAuthenticated && !hasUnlockedLocalSession()) {
       clearAuthenticatedAppState()
@@ -259,6 +283,7 @@ function App() {
     isViewerMode,
     isDemoMode,
     isAcceptingInvite,
+    isAdminRoute,
     clearAuthenticatedAppState
   ])
 
@@ -293,6 +318,8 @@ function App() {
         const session = await checkServerSession()
         if (cancelled) return
 
+        setServerSessionActive(session.authenticated)
+
         if (session.authenticated) {
           persistSessionUserId(session.userId)
         }
@@ -312,6 +339,10 @@ function App() {
         if (!cancelled) {
           console.warn('Session restore failed:', err)
         }
+      } finally {
+        if (!cancelled) {
+          setSessionChecked(true)
+        }
       }
     })()
 
@@ -333,6 +364,14 @@ function App() {
     setIsAcceptingInvite(false)
   }, [])
 
+  const openAdmin = useCallback(() => {
+    window.history.pushState({}, document.title, '/admin')
+    setIsAdminRoute(true)
+    setIsDemoMode(false)
+    setIsViewerMode(false)
+    setIsAcceptingInvite(false)
+  }, [])
+
   const selectLogbook = useCallback((id: string, title: string) => {
     setActiveLogbookId(id)
     setActiveLogbookTitle(title)
@@ -497,6 +536,7 @@ function App() {
     if (!(await confirmLeave())) return
     void logoutUser()
     setIsAuthenticated(false)
+    setIsAdminUser(false)
     setActiveLogbookId(null)
     setActiveLogbookTitle(null)
     setShowUserProfile(false)
@@ -524,6 +564,28 @@ function App() {
     syncRouteFromLocation()
   }
 
+  const handleBackFromAdmin = () => {
+    window.history.replaceState({}, document.title, '/')
+    setIsAdminRoute(false)
+    syncRouteFromLocation()
+  }
+
+  if (isAdminRoute) {
+    if (!isAuthenticated) {
+      return (
+        <div className="auth-screen">
+          <AuthOnboarding onAuthenticated={handleAuthenticated} onOpenDemo={openDemo} />
+        </div>
+      )
+    }
+
+    return (
+      <div style={{ display: 'contents' }}>
+        <AdminDashboard onBack={handleBackFromAdmin} />
+      </div>
+    )
+  }
+
   if (isDemoMode) {
     return (
       <div style={{ display: 'contents' }}>
@@ -564,7 +626,17 @@ function App() {
   if (!isAuthenticated) {
     return (
       <div className="auth-screen">
-        <AuthOnboarding onAuthenticated={handleAuthenticated} onOpenDemo={openDemo} />
+        {!sessionChecked ? (
+          <div className="auth-card glass">
+            <p className="dashboard-status-msg">{t('auth.restore_checking')}</p>
+          </div>
+        ) : (
+          <AuthOnboarding
+            restoreSession={serverSessionActive}
+            onAuthenticated={handleAuthenticated}
+            onOpenDemo={openDemo}
+          />
+        )}
       </div>
     )
   }
@@ -597,6 +669,7 @@ function App() {
           onSelectLogbook={selectLogbook}
           onLogout={handleLogout}
           onOpenProfile={() => setShowUserProfile(true)}
+          onOpenAdmin={isAdminUser ? openAdmin : undefined}
         />
       </div>
     )
@@ -647,6 +720,8 @@ function App() {
               <Languages size={18} />
             </button>
 
+            {isAdminUser && <AdminHeaderButton onClick={openAdmin} />}
+
             <ProfileHeaderButton onClick={() => setShowUserProfile(true)} />
 
             <DisclaimerHeaderButton />

client/src/admin/AdminDashboard.tsx

@@ -0,0 +1,240 @@
+import { useEffect, useState, type ReactNode } from 'react'
+import {
+  fetchAdminMe,
+  fetchAdminSummary,
+  fetchAdminTimeSeries,
+  type AdminSummary,
+  type AdminTimeSeriesResponse,
+  type AdminTimeBucket
+} from '../services/adminApi.js'
+import { BarChart2, Bookmark, ChevronLeft, Image, MapPin, Mic, Users } from 'lucide-react'
+
+function formatNumber(value: number): string {
+  return value.toLocaleString()
+}
+
+function KpiCard({
+  icon,
+  label,
+  value
+}: {
+  icon: ReactNode
+  label: string
+  value: number
+}) {
+  return (
+    <div className="stats-kpi-card glass">
+      <div className="stats-kpi-icon">{icon}</div>
+      <div className="stats-kpi-body">
+        <span className="stats-kpi-label">{label}</span>
+        <span className="stats-kpi-value">{formatNumber(value)}</span>
+      </div>
+    </div>
+  )
+}
+
+function TimeSeriesChart({
+  title,
+  seriesKey,
+  data
+}: {
+  title: string
+  seriesKey: string
+  data: AdminTimeSeriesResponse | null
+}) {
+  if (!data) {
+    return null
+  }
+
+  const metric = data.series.find((s) => s.metric === seriesKey)
+  if (!metric || metric.points.length === 0) {
+    return (
+      <div className="form-card glass">
+        <div className="form-header">
+          <BarChart2 className="form-icon" />
+          <h2>{title}</h2>
+        </div>
+        <p className="dashboard-status-msg">Keine Daten im gewählten Zeitraum.</p>
+      </div>
+    )
+  }
+
+  const max = metric.points.reduce((acc, p) => (p.count > acc ? p.count : acc), 0) || 1
+
+  return (
+    <div className="form-card glass">
+      <div className="form-header">
+        <BarChart2 className="form-icon" />
+        <h2>{title}</h2>
+      </div>
+      <div className="stats-bar-chart" role="img" aria-label={title}>
+        {metric.points.map((point) => {
+          const heightPct = Math.max(2, (point.count / max) * 100)
+          return (
+            <div key={point.date} className="stats-bar-column" title={`${point.date}: ${point.count}`}>
+              <span className="stats-bar-value">{point.count > 0 ? String(point.count) : ''}</span>
+              <div className="stats-bar-track">
+                <div className="stats-bar stats-bar--distance" style={{ height: `${heightPct}%` }} />
+              </div>
+              <span className="stats-bar-label">{point.date.slice(5)}</span>
+            </div>
+          )
+        })}
+      </div>
+    </div>
+  )
+}
+
+interface AdminDashboardProps {
+  onBack: () => void
+}
+
+export default function AdminDashboard({ onBack }: AdminDashboardProps) {
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState<string | null>(null)
+  const [summary, setSummary] = useState<AdminSummary | null>(null)
+  const [timeSeries, setTimeSeries] = useState<AdminTimeSeriesResponse | null>(null)
+  const [bucket, setBucket] = useState<AdminTimeBucket>('day')
+  const [windowDays, setWindowDays] = useState(90)
+
+  useEffect(() => {
+    let cancelled = false
+
+    async function load() {
+      try {
+        setLoading(true)
+        setError(null)
+
+        await fetchAdminMe()
+        const [summaryRes, tsRes] = await Promise.all([
+          fetchAdminSummary(),
+          fetchAdminTimeSeries({ bucket, windowDays })
+        ])
+
+        if (!cancelled) {
+          setSummary(summaryRes)
+          setTimeSeries(tsRes)
+        }
+      } catch (err: unknown) {
+        if (!cancelled) {
+          const message =
+            err instanceof Error && err.message ? err.message : 'Fehler beim Laden des Admin-Dashboards'
+          setError(message)
+        }
+      } finally {
+        if (!cancelled) {
+          setLoading(false)
+        }
+      }
+    }
+
+    void load()
+
+    return () => {
+      cancelled = true
+    }
+  }, [bucket, windowDays])
+
+  if (loading && !summary) {
+    return (
+      <div className="admin-page">
+        <p className="dashboard-status-msg">Admin-Dashboard wird geladen…</p>
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="admin-page">
+        <header className="admin-header">
+          <button type="button" className="btn-back" onClick={onBack}>
+            <ChevronLeft size={16} />
+            Zur App
+          </button>
+        </header>
+        <p className="dashboard-status-msg">{error}</p>
+      </div>
+    )
+  }
+
+  if (!summary) {
+    return (
+      <div className="admin-page">
+        <p className="dashboard-status-msg">Keine Admin-Daten verfügbar.</p>
+      </div>
+    )
+  }
+
+  return (
+    <div className="admin-page">
+      <header className="admin-header">
+        <div className="admin-header-left">
+          <button type="button" className="btn-back" onClick={onBack}>
+            <ChevronLeft size={16} />
+            Zur App
+          </button>
+          <div>
+            <h1 className="admin-title">Admin-Dashboard</h1>
+            <p className="admin-subtitle">
+              Übersicht über Nutzung und Wachstum von Kapteins Daagbok.
+            </p>
+          </div>
+        </div>
+      </header>
+
+      <main className="admin-main">
+        <section className="stats-kpi-grid admin-kpi-grid">
+          <KpiCard icon={<Users size={20} />} label="Registrierte Benutzer" value={summary.totalUsers} />
+          <KpiCard icon={<Bookmark size={20} />} label="Logbücher" value={summary.totalLogbooks} />
+          <KpiCard icon={<Image size={20} />} label="Fotos" value={summary.totalPhotos} />
+          <KpiCard icon={<Mic size={20} />} label="Sprachmemos" value={summary.totalVoiceMemos} />
+          <KpiCard icon={<MapPin size={20} />} label="GPS-Tracks" value={summary.totalGpsTracks} />
+          <KpiCard
+            icon={<BarChart2 size={20} />}
+            label="Einträge mit AI-Zusammenfassung"
+            value={summary.aiSummaryEntries}
+          />
+        </section>
+
+        <section className="admin-controls">
+          <div className="admin-control-group">
+            <span className="admin-control-label">Zeitraum</span>
+            <div className="admin-control-buttons">
+              {[30, 90, 365].map((days) => (
+                <button
+                  key={days}
+                  type="button"
+                  className={days === windowDays ? 'btn primary' : 'btn secondary'}
+                  onClick={() => setWindowDays(days)}
+                >
+                  {days} Tage
+                </button>
+              ))}
+            </div>
+          </div>
+          <div className="admin-control-group">
+            <span className="admin-control-label">Aggregation</span>
+            <div className="admin-control-buttons">
+              {(['day', 'week', 'month'] as AdminTimeBucket[]).map((b) => (
+                <button
+                  key={b}
+                  type="button"
+                  className={b === bucket ? 'btn primary' : 'btn secondary'}
+                  onClick={() => setBucket(b)}
+                >
+                  {b === 'day' ? 'Tag' : b === 'week' ? 'Woche' : 'Monat'}
+                </button>
+              ))}
+            </div>
+          </div>
+        </section>
+
+        <section className="admin-charts-grid">
+          <TimeSeriesChart title="Neue Benutzer" seriesKey="users_created" data={timeSeries} />
+          <TimeSeriesChart title="Neue Logbücher" seriesKey="logbooks_created" data={timeSeries} />
+          <TimeSeriesChart title="Foto-Aktivität" seriesKey="photos_updated" data={timeSeries} />
+        </section>
+      </main>
+    </div>
+  )
+}

client/src/components/AdminHeaderButton.tsx

@@ -0,0 +1,23 @@
+import { useTranslation } from 'react-i18next'
+import { LayoutDashboard } from 'lucide-react'
+
+interface AdminHeaderButtonProps {
+  onClick: () => void
+}
+
+export default function AdminHeaderButton({ onClick }: AdminHeaderButtonProps) {
+  const { t } = useTranslation()
+
+  return (
+    <button
+      type="button"
+      className="btn-icon skipper-badge"
+      onClick={onClick}
+      title={t('nav.admin')}
+      aria-label={t('nav.admin')}
+    >
+      <LayoutDashboard size={18} aria-hidden="true" />
+      <span className="skipper-badge__name">{t('nav.admin')}</span>
+    </button>
+  )
+}

client/src/components/AppFooter.tsx

@@ -1,4 +1,4 @@
-import { Coffee, Mail } from 'lucide-react'
+import { Coffee, Mail, Compass } from 'lucide-react'
 import { useTranslation } from 'react-i18next'
 import { PlausibleEvents, trackPlausibleEvent } from '../services/analytics.js'
 
@@ -15,11 +15,24 @@ export default function AppFooter() {
         ·
       </span>
       <span className="app-version-footer__copyright">
-        © 2026 KnorrLabs
+        © 2026
       </span>
       <span className="app-version-footer__sep" aria-hidden="true">
         ·
       </span>
+      <a
+        className="knorrlabs-footer-badge"
+        href="https://dashy.elpatron.me/"
+        target="_blank"
+        rel="noopener noreferrer"
+        onClick={() => trackPlausibleEvent(PlausibleEvents.FOOTER_LINK_CLICKED)}
+      >
+        <Compass size={14} aria-hidden="true" />
+        <span>KnorrLabs</span>
+      </a>
+      <span className="app-version-footer__sep" aria-hidden="true">
+        ·
+      </span>
       <a
         className="mail-footer-badge"
         href="mailto:moin@kapteins-daagbok.eu"

client/src/components/AuthOnboarding.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from 'react'
+import React, { useEffect, useRef, useState } from 'react'
 import { useTranslation } from 'react-i18next'
 import { cycleAppLanguage, getNextLanguage } from '../utils/i18nLanguages.js'
 import {
@@ -12,7 +12,8 @@ import {
   getKnownUsernames,
   forgetUsername,
   hasUnlockedLocalSession,
-  logoutUser
+  logoutUser,
+  resolveRestoreUsername
 } from '../services/auth.js'
 import { KeyRound, ShieldAlert, Languages, HelpCircle, UserRound, X } from 'lucide-react'
 import RegistrationDisclaimer from './RegistrationDisclaimer.tsx'
@@ -27,9 +28,15 @@ import {
 interface AuthOnboardingProps {
   onAuthenticated: () => void
   onOpenDemo?: () => void
+  /** Server session cookie is valid but the in-memory master key was lost (e.g. after reload). */
+  restoreSession?: boolean
 }
 
-export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnboardingProps) {
+export default function AuthOnboarding({
+  onAuthenticated,
+  onOpenDemo,
+  restoreSession = false
+}: AuthOnboardingProps) {
   const { t, i18n } = useTranslation()
   const [username, setUsername] = useState('')
   const [loading, setLoading] = useState(false)
@@ -60,7 +67,10 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
   const [isNewRegistration, setIsNewRegistration] = useState(false)
   const [showDisclaimer, setShowDisclaimer] = useState(false)
   const [showHelp, setShowHelp] = useState(false)
+  const [showStandardLogin, setShowStandardLogin] = useState(false)
+  const autoUnlockAttempted = useRef(false)
 
+  const isRestoreFlow = restoreSession && !showStandardLogin
   const passkeyHostOk = isPasskeyCompatibleLocation()
   const passkeyCompatibleUrl = passkeyHostOk ? null : toPasskeyCompatibleUrl(window.location.href)
 
@@ -144,6 +154,23 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
     }
   }
 
+  useEffect(() => {
+    if (!isRestoreFlow || autoUnlockAttempted.current) return
+
+    const user = resolveRestoreUsername()
+    if (user && hasLocalPin(user)) {
+      autoUnlockAttempted.current = true
+      setUsername(user)
+      setShowPinLogin(true)
+      return
+    }
+
+    if (user && passkeyHostOk) {
+      autoUnlockAttempted.current = true
+      void handleLogin(user)
+    }
+  }, [isRestoreFlow, passkeyHostOk])
+
   const handleRecoverySubmit = async (e: React.FormEvent) => {
     e.preventDefault()
     if (!recoveryInput.trim() || !encryptedPayloads) return
@@ -347,10 +374,10 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
       <div className="auth-card glass">
         <div className="auth-header">
           <KeyRound className="auth-icon accent" size={48} />
-          <h2>{t('auth.enter_pin_title')}</h2>
+          <h2>{isRestoreFlow ? t('auth.restore_title') : t('auth.enter_pin_title')}</h2>
         </div>
         <p className="recovery-warning">
-          {t('auth.enter_pin_warning')}
+          {isRestoreFlow ? t('auth.restore_pin_warning') : t('auth.enter_pin_warning')}
         </p>
 
         <form onSubmit={handlePinLoginSubmit} className="auth-form">
@@ -397,6 +424,12 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
               type="button"
               className="btn secondary"
               onClick={() => {
+                if (isRestoreFlow) {
+                  setShowPinLogin(false)
+                  setPinLoginInput('')
+                  setError(null)
+                  return
+                }
                 void (async () => {
                   setShowPinLogin(false)
                   setPinLoginInput('')
@@ -480,6 +513,101 @@ export default function AuthOnboarding({ onAuthenticated, onOpenDemo }: AuthOnbo
     )
   }
 
+  // Render: Session restore (active server cookie, master key lost after reload)
+  if (isRestoreFlow) {
+    const restoreUser = resolveRestoreUsername()
+    const restoreKnownUsers = getKnownUsernames()
+
+    return (
+      <div className="auth-card glass">
+        <div className="auth-header">
+          <KeyRound className="auth-icon accent" size={48} />
+          <h2>{t('auth.restore_title')}</h2>
+        </div>
+        <p className="recovery-warning">{t('auth.restore_subtitle')}</p>
+
+        {loading && (
+          <p className="dashboard-status-msg" style={{ marginTop: '12px' }}>
+            {t('auth.restore_unlocking')}
+          </p>
+        )}
+
+        {error && <div className="auth-error">{error}</div>}
+
+        {!loading && (
+          <div className="auth-actions" style={{ flexDirection: 'column', gap: '10px', marginTop: '16px' }}>
+            {restoreUser && passkeyHostOk && (
+              <button
+                type="button"
+                className="btn primary"
+                onClick={() => handleLogin(restoreUser)}
+                style={{ width: '100%' }}
+              >
+                {t('auth.restore_with_passkey', { name: restoreUser })}
+              </button>
+            )}
+
+            {restoreUser && hasLocalPin(restoreUser) && (
+              <button
+                type="button"
+                className="btn secondary"
+                onClick={() => {
+                  setUsername(restoreUser)
+                  setShowPinLogin(true)
+                }}
+                style={{ width: '100%' }}
+              >
+                {t('auth.restore_with_pin')}
+              </button>
+            )}
+
+            {restoreKnownUsers.length > 1 && (
+              <div style={{ display: 'flex', flexDirection: 'column', gap: '8px', width: '100%' }}>
+                <span style={{ fontSize: '12px', color: '#64748b', textTransform: 'uppercase' }}>
+                  {t('auth.quick_login')}
+                </span>
+                <div style={{ display: 'flex', flexWrap: 'wrap', gap: '8px', width: '100%' }}>
+                  {restoreKnownUsers.map((name) => (
+                    <button
+                      key={name}
+                      type="button"
+                      onClick={() => {
+                        if (hasLocalPin(name)) {
+                          setUsername(name)
+                          setShowPinLogin(true)
+                        } else {
+                          void handleLogin(name)
+                        }
+                      }}
+                      disabled={loading}
+                      className="btn secondary"
+                      style={{ display: 'flex', alignItems: 'center', gap: '6px' }}
+                    >
+                      <UserRound size={16} />
+                      {name}
+                    </button>
+                  ))}
+                </div>
+              </div>
+            )}
+
+            <button
+              type="button"
+              className="btn secondary"
+              onClick={() => {
+                setShowStandardLogin(true)
+                setError(null)
+              }}
+              style={{ width: '100%' }}
+            >
+              {t('auth.restore_other_account')}
+            </button>
+          </div>
+        )}
+      </div>
+    )
+  }
+
   // Render 3: Standard Login / Registration options form
   return (
     <>

client/src/components/LogbookDashboard.tsx

@@ -15,11 +15,13 @@ import { BookOpen, Plus, Trash2, LogOut, Languages, RefreshCw, Ship, Wifi, WifiO
 import DisclaimerHeaderButton from './DisclaimerHeaderButton.tsx'
 import FeedbackHeaderButton from './FeedbackHeaderButton.tsx'
 import ProfileHeaderButton from './ProfileHeaderButton.tsx'
+import AdminHeaderButton from './AdminHeaderButton.tsx'
 
 interface LogbookDashboardProps {
   onSelectLogbook: (id: string, title: string) => void
   onLogout: () => void
   onOpenProfile: () => void
+  onOpenAdmin?: () => void
 }
 
 type LogbookSortKey = 'name' | 'date'
@@ -42,7 +44,7 @@ function sortLogbooks(
   return sorted
 }
 
-export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProfile }: LogbookDashboardProps) {
+export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProfile, onOpenAdmin }: LogbookDashboardProps) {
   const { t, i18n } = useTranslation()
   const { showConfirm } = useDialog()
   const [logbooks, setLogbooks] = useState<DecryptedLogbook[]>([])
@@ -388,6 +390,8 @@ export default function LogbookDashboard({ onSelectLogbook, onLogout, onOpenProf
 
           <ProfileHeaderButton onClick={onOpenProfile} />
 
+          {onOpenAdmin && <AdminHeaderButton onClick={onOpenAdmin} />}
+
           {/* Lang toggle */}
           <button className="btn-icon" onClick={toggleLanguage} title="Switch Language">
             <Languages size={18} />

client/src/i18n/locales/da.json

@@ -43,7 +43,8 @@
       "deviation": "Tabel over distraktioner",
       "logs": "Indlæg i logbogen",
       "stats": "Statistik",
-      "settings": "Indstillinger"
+      "settings": "Indstillinger",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Velkommen til Kapteins Daagbok.",
@@ -90,7 +91,15 @@
       "use_localhost_link": "Skift til localhost",
       "error_passkey_cancelled": "Passkey-login blev annulleret eller udløb. Prøv igen.",
       "error_invalid_rp_id": "Passkey-domæne matcher ikke (RP ID). Brug http://localhost:5173 med RP_ID=localhost i .env til lokal udvikling.",
-      "error_session_incomplete": "Login ufuldstændig. Log ind med passkey igen."
+      "error_session_incomplete": "Login ufuldstændig. Log ind med passkey igen.",
+      "restore_checking": "Tjekker session…",
+      "restore_title": "Gendan session",
+      "restore_subtitle": "Du er stadig logget ind. Lås din logbog op med passkey eller PIN.",
+      "restore_unlocking": "Låser op…",
+      "restore_with_passkey": "Lås op med passkey ({{name}})",
+      "restore_with_pin": "Lås op med PIN",
+      "restore_pin_warning": "Indtast din lokale PIN for at låse logbogen op efter genindlæsning.",
+      "restore_other_account": "Log ind med en anden konto"
     },
     "pwa": {
       "title": "Installer app",

client/src/i18n/locales/de.json

@@ -43,7 +43,8 @@
       "deviation": "Ablenkungstabelle",
       "logs": "Logbucheinträge",
       "stats": "Statistik",
-      "settings": "Einstellungen"
+      "settings": "Einstellungen",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Willkommen bei Kapteins Daagbok",
@@ -90,7 +91,15 @@
       "use_localhost_link": "Zu localhost wechseln",
       "error_passkey_cancelled": "Passkey-Anmeldung abgebrochen oder abgelaufen. Bitte erneut versuchen.",
       "error_invalid_rp_id": "Passkey-Domain passt nicht (RP ID). Lokal nur http://localhost:5173 mit RP_ID=localhost in .env verwenden.",
-      "error_session_incomplete": "Anmeldung unvollständig. Bitte erneut mit Passkey anmelden."
+      "error_session_incomplete": "Anmeldung unvollständig. Bitte erneut mit Passkey anmelden.",
+      "restore_checking": "Session wird geprüft…",
+      "restore_title": "Session wiederherstellen",
+      "restore_subtitle": "Deine Anmeldung ist noch aktiv. Entsperre dein Logbuch mit Passkey oder PIN.",
+      "restore_unlocking": "Wird entsperrt…",
+      "restore_with_passkey": "Mit Passkey entsperren ({{name}})",
+      "restore_with_pin": "Mit PIN entsperren",
+      "restore_pin_warning": "Gib deine lokale PIN ein, um dein Logbuch nach dem Neuladen zu entsperren.",
+      "restore_other_account": "Anderer Account anmelden"
     },
     "pwa": {
       "title": "App installieren",

client/src/i18n/locales/en.json

@@ -43,7 +43,8 @@
       "deviation": "Deviation Table",
       "logs": "Logbook Entries",
       "stats": "Statistics",
-      "settings": "Settings"
+      "settings": "Settings",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Welcome to Kapteins Daagbok",
@@ -90,7 +91,15 @@
       "use_localhost_link": "Switch to localhost",
       "error_passkey_cancelled": "Passkey sign-in was cancelled or timed out. Please try again.",
       "error_invalid_rp_id": "Passkey domain mismatch (RP ID). For local dev use http://localhost:5173 with RP_ID=localhost in .env.",
-      "error_session_incomplete": "Sign-in incomplete. Please sign in with your passkey again."
+      "error_session_incomplete": "Sign-in incomplete. Please sign in with your passkey again.",
+      "restore_checking": "Checking session…",
+      "restore_title": "Restore session",
+      "restore_subtitle": "You are still signed in. Unlock your logbook with passkey or PIN.",
+      "restore_unlocking": "Unlocking…",
+      "restore_with_passkey": "Unlock with passkey ({{name}})",
+      "restore_with_pin": "Unlock with PIN",
+      "restore_pin_warning": "Enter your local PIN to unlock your logbook after reload.",
+      "restore_other_account": "Sign in with another account"
     },
     "pwa": {
       "title": "Install app",

client/src/i18n/locales/nb.json

@@ -43,7 +43,8 @@
       "deviation": "Tabell over distraksjoner",
       "logs": "Loggbokoppføringer",
       "stats": "Statistikk",
-      "settings": "Innstillinger"
+      "settings": "Innstillinger",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Velkommen til Kapteins Daagbok",
@@ -90,7 +91,15 @@
       "use_localhost_link": "Bytt til localhost",
       "error_passkey_cancelled": "Passkey-innlogging ble avbrutt eller utløp. Prøv igjen.",
       "error_invalid_rp_id": "Passkey-domene stemmer ikke (RP ID). Bruk http://localhost:5173 med RP_ID=localhost i .env for lokal utvikling.",
-      "error_session_incomplete": "Innlogging ufullstendig. Logg inn med passkey igjen."
+      "error_session_incomplete": "Innlogging ufullstendig. Logg inn med passkey igjen.",
+      "restore_checking": "Sjekker økt…",
+      "restore_title": "Gjenopprett økt",
+      "restore_subtitle": "Du er fortsatt innlogget. Lås opp loggboken med passkey eller PIN.",
+      "restore_unlocking": "Låser opp…",
+      "restore_with_passkey": "Lås opp med passkey ({{name}})",
+      "restore_with_pin": "Lås opp med PIN",
+      "restore_pin_warning": "Skriv inn din lokale PIN for å låse opp loggboken etter omlasting.",
+      "restore_other_account": "Logg inn med en annen konto"
     },
     "pwa": {
       "title": "Installer app",

client/src/i18n/locales/sv.json

@@ -43,7 +43,8 @@
       "deviation": "Distraktionsbord",
       "logs": "Loggboksanteckningar",
       "stats": "Statistik",
-      "settings": "Inställningar"
+      "settings": "Inställningar",
+      "admin": "Admin"
     },
     "auth": {
       "welcome": "Välkommen till Kapteins Daagbok",
@@ -90,7 +91,15 @@
       "use_localhost_link": "Byt till localhost",
       "error_passkey_cancelled": "Passkey-inloggning avbröts eller gick ut. Försök igen.",
       "error_invalid_rp_id": "Passkey-domänen matchar inte (RP ID). Använd http://localhost:5173 med RP_ID=localhost i .env för lokal utveckling.",
-      "error_session_incomplete": "Inloggning ofullständig. Logga in med passkey igen."
+      "error_session_incomplete": "Inloggning ofullständig. Logga in med passkey igen.",
+      "restore_checking": "Kontrollerar session…",
+      "restore_title": "Återställ session",
+      "restore_subtitle": "Du är fortfarande inloggad. Lås upp din loggbok med passkey eller PIN.",
+      "restore_unlocking": "Låser upp…",
+      "restore_with_passkey": "Lås upp med passkey ({{name}})",
+      "restore_with_pin": "Lås upp med PIN",
+      "restore_pin_warning": "Ange din lokala PIN för att låsa upp loggboken efter omladdning.",
+      "restore_other_account": "Logga in med ett annat konto"
     },
     "pwa": {
       "title": "Installera app",

client/src/services/adminApi.ts

@@ -0,0 +1,74 @@
+import { ApiError, apiJson } from './api.js'
+
+const ADMIN_BASE = '/api/admin'
+
+export interface AdminMe {
+  isAdmin: boolean
+  userId: string
+}
+
+export interface AdminSummary {
+  totalUsers: number
+  totalLogbooks: number
+  totalPhotos: number
+  totalVoiceMemos: number
+  totalGpsTracks: number
+  totalCollaborations: number
+  totalInvitations: number
+  aiSummaryEntries: number
+}
+
+export type AdminTimeBucket = 'day' | 'week' | 'month'
+
+export interface AdminTimeSeriesPoint {
+  date: string
+  count: number
+}
+
+export interface AdminTimeSeriesMetric {
+  metric: string
+  points: AdminTimeSeriesPoint[]
+}
+
+export interface AdminTimeSeriesResponse {
+  bucket: AdminTimeBucket
+  windowDays: number
+  series: AdminTimeSeriesMetric[]
+}
+
+export async function fetchAdminMe(): Promise<AdminMe> {
+  return await apiJson<AdminMe>(`${ADMIN_BASE}/me`)
+}
+
+/** Returns true only for users listed in server ADMIN_USER_IDS. */
+export async function checkAdminAccess(): Promise<boolean> {
+  try {
+    await fetchAdminMe()
+    return true
+  } catch (err) {
+    if (err instanceof ApiError && (err.status === 401 || err.status === 403)) {
+      return false
+    }
+    return false
+  }
+}
+
+export async function fetchAdminSummary(): Promise<AdminSummary> {
+  return await apiJson<AdminSummary>(`${ADMIN_BASE}/summary`)
+}
+
+export async function fetchAdminTimeSeries(
+  params: { bucket?: AdminTimeBucket; windowDays?: number } = {}
+): Promise<AdminTimeSeriesResponse> {
+  const search = new URLSearchParams()
+  if (params.bucket) {
+    search.set('bucket', params.bucket)
+  }
+  if (params.windowDays && Number.isFinite(params.windowDays)) {
+    search.set('window', String(params.windowDays))
+  }
+  const query = search.toString()
+  const url = query ? `${ADMIN_BASE}/timeseries?${query}` : `${ADMIN_BASE}/timeseries`
+  return await apiJson<AdminTimeSeriesResponse>(url)
+}
+

client/src/services/auth.ts

@@ -64,6 +64,15 @@ export function persistSessionUserId(userId: string | undefined): void {
   }
 }
 
+/** Username to use when re-unlocking after reload (active account or sole remembered user). */
+export function resolveRestoreUsername(): string | null {
+  const stored = localStorage.getItem('active_username')
+  if (stored) return stored
+  const known = getKnownUsernames()
+  if (known.length === 1) return known[0]
+  return null
+}
+
 export async function reauthWithPasskey(): Promise<boolean> {
   const options = await apiJson<any>(`${API_BASE}/reauth-options`, {
     method: 'POST'

client/src/services/authSession.test.ts

@@ -2,6 +2,7 @@ import { beforeEach, describe, expect, it } from 'vitest'
 import {
   hasUnlockedLocalCrypto,
   hasUnlockedLocalSession,
+  resolveRestoreUsername,
   setActiveMasterKey
 } from './auth.js'
 
@@ -33,6 +34,28 @@ describe('local session unlock checks', () => {
   })
 })
 
+describe('resolveRestoreUsername', () => {
+  beforeEach(() => {
+    localStorage.clear()
+  })
+
+  it('prefers active_username from storage', () => {
+    localStorage.setItem('active_username', 'captain')
+    localStorage.setItem('daagbox_known_users', JSON.stringify(['other']))
+    expect(resolveRestoreUsername()).toBe('captain')
+  })
+
+  it('falls back to a single remembered user', () => {
+    localStorage.setItem('daagbox_known_users', JSON.stringify(['solo']))
+    expect(resolveRestoreUsername()).toBe('solo')
+  })
+
+  it('returns null when multiple users and no active username', () => {
+    localStorage.setItem('daagbox_known_users', JSON.stringify(['alpha', 'beta']))
+    expect(resolveRestoreUsername()).toBeNull()
+  })
+})
+
 describe('persistSessionUserId', () => {
   beforeEach(() => {
     localStorage.clear()

docker-compose.yml

@@ -35,6 +35,7 @@ services:
       OpenRouterAPIKey: ${OpenRouterAPIKey:-}
       OpenRouterModel: ${OpenRouterModel:-anthropic/claude-3.5-haiku}
       SESSION_SECRET: ${SESSION_SECRET:-}
+      ADMIN_USER_IDS: ${ADMIN_USER_IDS:-}
       NTFY_SERVER: ${NTFY_SERVER:-https://ntfy.sh}
       NTFY_TOPIC: ${NTFY_TOPIC:-}
       NTFY_TOKEN: ${NTFY_TOKEN:-}

server/src/adminConfig.ts

@@ -0,0 +1,25 @@
+const ADMIN_ENV_KEY = 'ADMIN_USER_IDS'
+
+export function getAdminUserIds(): Set<string> {
+  const raw = process.env[ADMIN_ENV_KEY]
+  if (!raw) {
+    return new Set()
+  }
+
+  const ids = raw
+    .split(',')
+    .map((id) => id.trim())
+    .filter((id) => id.length > 0)
+
+  if (ids.length === 0) {
+    return new Set()
+  }
+
+  return new Set(ids)
+}
+
+export function isAdminUserId(userId: string): boolean {
+  const adminIds = getAdminUserIds()
+  return adminIds.has(userId)
+}
+

server/src/app.ts

@@ -12,6 +12,7 @@ import pushRouter from './routes/push.js'
 import weatherRouter from './routes/weather.js'
 import aiRouter from './routes/ai.js'
 import feedbackRouter from './routes/feedback.js'
+import adminRouter from './routes/admin.js'
 import { prisma } from './db.js'
 import { buildCorsOptions } from './cors.js'
 
@@ -121,6 +122,7 @@ export function createApp(): express.Express {
   app.use('/api/weather', weatherRouter)
   app.use('/api/ai', aiRouter)
   app.use('/api/feedback', feedbackRouter)
+  app.use('/api/admin', adminRouter)
 
   app.get('/api/health', async (_req, res) => {
     try {

server/src/middleware/auth.ts

@@ -1,5 +1,6 @@
 import type { Request, Response, NextFunction } from 'express'
 import { hasValidReauth, readSessionFromRequest } from '../session.js'
+import { isAdminUserId } from '../adminConfig.js'
 
 export interface AuthedRequest extends Request {
   userId: string
@@ -31,3 +32,21 @@ export function requireReauth(req: Request, res: Response, next: NextFunction):
   ;(req as AuthedRequest).session = session
   next()
 }
+
+export function requireAdmin(req: Request, res: Response, next: NextFunction): void {
+  const session = readSessionFromRequest(req)
+  if (!session) {
+    res.status(401).json({ error: 'Unauthorized: valid session required' })
+    return
+  }
+
+  if (!isAdminUserId(session.userId)) {
+    res.status(403).json({ error: 'Forbidden: admin access required' })
+    return
+  }
+
+  ;(req as AuthedRequest).userId = session.userId
+  ;(req as AuthedRequest).session = session
+  next()
+}
+

server/src/routes/admin.ts

@@ -0,0 +1,151 @@
+import { Router } from 'express'
+import { prisma } from '../db.js'
+import { requireUser, requireAdmin, type AuthedRequest } from '../middleware/auth.js'
+
+const router = Router()
+
+router.get('/me', requireUser, requireAdmin, (req, res) => {
+  const { userId } = req as AuthedRequest
+  res.json({ isAdmin: true, userId })
+})
+
+router.get('/summary', requireUser, requireAdmin, async (_req, res) => {
+  try {
+    const [totalUsers, totalLogbooks, totalPhotos, totalVoiceMemos, totalGpsTracks, totalCollaborations, totalInvitations, aiSummaryEntries] =
+      await Promise.all([
+        prisma.user.count(),
+        prisma.logbook.count(),
+        prisma.photoPayload.count(),
+        prisma.voiceMemoPayload.count(),
+        prisma.gpsTrackPayload.count(),
+        prisma.collaboration.count(),
+        prisma.invitation.count(),
+        prisma.aiSummaryUsage.count()
+      ])
+
+    res.json({
+      totalUsers,
+      totalLogbooks,
+      totalPhotos,
+      totalVoiceMemos,
+      totalGpsTracks,
+      totalCollaborations,
+      totalInvitations,
+      aiSummaryEntries
+    })
+  } catch (error: unknown) {
+    console.error('admin/summary error', error)
+    res.status(500).json({ error: 'Failed to load admin summary' })
+  }
+})
+
+type TimeBucket = 'day' | 'week' | 'month'
+
+interface TimeSeriesPoint {
+  date: string
+  count: number
+}
+
+interface TimeSeries {
+  metric: string
+  points: TimeSeriesPoint[]
+}
+
+function normalizeBucket(value: string | undefined | null): TimeBucket {
+  if (value === 'week' || value === 'month') return value
+  return 'day'
+}
+
+function parseWindowDays(raw: string | undefined | null): number {
+  const n = raw ? Number.parseInt(raw, 10) : NaN
+  if (!Number.isFinite(n) || n <= 0) return 90
+  return Math.min(n, 365)
+}
+
+function startOfDay(date: Date): Date {
+  const d = new Date(date)
+  d.setUTCHours(0, 0, 0, 0)
+  return d
+}
+
+function startOfWeek(date: Date): Date {
+  const d = startOfDay(date)
+  const day = d.getUTCDay() || 7
+  d.setUTCDate(d.getUTCDate() - (day - 1))
+  return d
+}
+
+function startOfMonth(date: Date): Date {
+  const d = startOfDay(date)
+  d.setUTCDate(1)
+  return d
+}
+
+function bucketDate(date: Date, bucket: TimeBucket): string {
+  const base =
+    bucket === 'week' ? startOfWeek(date) : bucket === 'month' ? startOfMonth(date) : startOfDay(date)
+  return base.toISOString().slice(0, 10)
+}
+
+async function buildTimeSeries(bucket: TimeBucket, windowDays: number): Promise<TimeSeries[]> {
+  const since = new Date()
+  since.setUTCDate(since.getUTCDate() - windowDays)
+
+  const [users, logbooks, photos] = await Promise.all([
+    prisma.user.findMany({
+      where: { createdAt: { gte: since } },
+      select: { createdAt: true }
+    }),
+    prisma.logbook.findMany({
+      where: { createdAt: { gte: since } },
+      select: { createdAt: true }
+    }),
+    prisma.photoPayload.findMany({
+      where: { updatedAt: { gte: since } },
+      select: { updatedAt: true }
+    })
+  ])
+
+  function aggregate(dates: Date[], metric: string): TimeSeries {
+    const map = new Map<string, number>()
+    for (const d of dates) {
+      const key = bucketDate(d, bucket)
+      map.set(key, (map.get(key) ?? 0) + 1)
+    }
+    const points = Array.from(map.entries())
+      .sort(([a], [b]) => (a < b ? -1 : a > b ? 1 : 0))
+      .map(([date, count]) => ({ date, count }))
+    return { metric, points }
+  }
+
+  return [
+    aggregate(
+      users.map((u) => u.createdAt),
+      'users_created'
+    ),
+    aggregate(
+      logbooks.map((l) => l.createdAt),
+      'logbooks_created'
+    ),
+    aggregate(
+      photos.map((p) => p.updatedAt),
+      'photos_updated'
+    )
+  ]
+}
+
+router.get('/timeseries', requireUser, requireAdmin, async (req, res) => {
+  try {
+    const bucket = normalizeBucket(typeof req.query.bucket === 'string' ? req.query.bucket : undefined)
+    const windowDays = parseWindowDays(typeof req.query.window === 'string' ? req.query.window : undefined)
+
+    const series = await buildTimeSeries(bucket, windowDays)
+    res.json({ bucket, windowDays, series })
+  } catch (error: unknown) {
+    console.error('admin/timeseries error', error)
+    res.status(500).json({ error: 'Failed to load admin time series' })
+  }
+})
+
+export default router
+